CPU goes to 100% when mqtt server is started with no network

[ZhiweiLi]

CPU goes to 100% when mqtt server is started with no network
and it cannot recover when network comes back

when enabled log , i saw tremendous log printing repeately

19700101 150802.649 Could not find client corresponding to socket 6
19700101 150802.649 (2051) (1)> MQTTAsync_cycle:2814
19700101 150802.649 (2051) (2)> Socket_getReadySocket:217
19700101 150802.649 Return code 1 from read select
19700101 150802.649 (2051) (3)> Socket_continueWrites:776
19700101 150802.649 (2051) (3)< Socket_continueWrites:798 (0)
19700101 150802.649 Return code 1 from write select
19700101 150802.649 (2051) (3)> isReady:193
19700101 150802.649 (2051) (3)< isReady:198 (1)
19700101 150802.669 (2051) (2)< Socket_getReadySocket:283 (6)
19700101 150802.669 (2051) (2)> MQTTAsync_retry:2677
19700101 150802.669 (2051) (3)> MQTTProtocol_retry:629
19700101 150802.669 (2051) (3)< MQTTProtocol_retry:648
19700101 150802.669 (2051) (2)< MQTTAsync_retry:2687
19700101 150802.669 (2051) (1)< MQTTAsync_cycle:2946 (-1)
19700101 150802.669 Could not find client corresponding to socket 6

After checking the code, it seems that it is stucked in the infinite loop
in function MQTTAsync_receiveThread()
/* find client corresponding to socket /
if (ListFindItem(handles, &sock, clientSockCompare) == NULL)
{
Log(TRACE_MINIMUM, -1, "Could not find client corresponding to socket %d", sock);
/ Socket_close(sock); - removing socket in this case is not necessary (Bug 442400) */
continue;
}

my client version:
Trace Output
Product name: Paho Asynchronous MQTT C Client Library
Version: 1.1.0
Build level: 17:38--04-06-2018
OpenSSL version: OpenSSL 1.0.2k 26 Jan 2017
OpenSSL flags: compiler: /usr/local/ARC/arcp1/uclibc/bin/arc-linux-uclibc-gcc -I. -I.. -I../include -fPIC -DOPENSSL_PIC -DDSO_DLFCN -DHAVE_DLFCN_H -I/home/zli/work/sdk
OpenSSL build timestamp: built on: reproducible build, date unspecified
OpenSSL platform: platform: linux-arc
OpenSSL directory: OPENSSLDIR: "/usr/lib/ssl"
/proc/version: Linux version 2.6.35.12 (zli@ddfeerd) (gcc version 4.2.3 (ARC_2.3)) #10 Mon Jun 4 19:38:20 CST 2018

[icraggs]

Can you try the latest version 1.2.1? There have been a number of fixes in this area.

[ZhiweiLi]

Hi, Icraggs,

Thanks a log for your prompt response
I have upgraded to 1.2.1 and issue resolved.
I will close this issue.